Welcome to Year 7 Science! Today we will explore our solar system and understand Earth's place within it. Our solar system consists of the Sun, which is our nearest star, eight planets including Earth, and many other objects like moons, asteroids, and comets. This system formed about 4.6 billion years ago.
The Sun is the center of our solar system and our nearest star. It's a massive ball of hot gas with a surface temperature of about 5,500 degrees Celsius and a core temperature of 15 million degrees Celsius. The Sun provides all the light and heat that makes life on Earth possible. Its enormous gravity keeps all the planets, including Earth, in their orbits around it.
Welcome to our lesson about planets! A planet is a large celestial body that orbits around a star. In our solar system, planets must be round in shape, orbit the Sun, and have cleared their orbital path of other objects. Our solar system contains eight fascinating planets that we will explore today.
The eight planets in our solar system can be divided into two main groups. The inner planets, also called terrestrial planets, are rocky and solid. They are smaller in size and located closer to the Sun, making them warmer. The outer planets are gas giants, made mostly of gas and ice. They are much larger and located farther from the Sun, making them much colder.
Our solar system contains eight planets, which we can divide into two main groups. The inner planets are Mercury, Venus, Earth, and Mars. These are rocky planets that are closer to the Sun. The outer planets are Jupiter, Saturn, Uranus, and Neptune. These are much larger gas giants located farther from the Sun. Between the inner and outer planets is the asteroid belt, containing thousands of rocky objects.
Planets have many interesting characteristics that make them unique. Jupiter is so large that all other planets could fit inside it! Earth is the largest of the rocky planets. The distance from the Sun affects temperature - Mercury is the closest and very hot, while Neptune is the farthest and extremely cold. Each planet has special features, like Saturn's beautiful rings, Earth's liquid water, and Mars' red appearance.
To summarize what we have learned about planets: Our solar system contains eight planets that orbit around the Sun. The inner planets are rocky and small, while the outer planets are gas giants that are much larger. Each planet has unique characteristics that make it special. Understanding planets helps us learn more about our solar system and space exploration.
Earth is our home planet and the third planet from the Sun. What makes Earth special is its perfect distance from the Sun, which allows liquid water to exist. Earth has a protective atmosphere and is the only planet we know that supports life. Earth moves in two important ways: it rotates on its axis every 24 hours creating day and night, and it orbits around the Sun every 365 days creating our seasons.
To summarize what we have learned about planets: Our solar system contains eight planets that orbit the Sun. The inner planets are rocky and located closer to the Sun, while the outer planets are gas giants positioned farther away. Earth is perfectly positioned to support life with liquid water and a protective atmosphere. Understanding planets and our solar system helps us learn about space exploration and our place in the universe.